Joint association of coffee consumption and other factors to the risk of type 2 diabetes: a prospective study in Finland

Hu, Gang; Jousilahti, Pekka; Peltonen, Markku; Bidel, Siamak; Tuomilehto, Jaakko

doi:10.1038/sj.ijo.0803341

Cited by 56 publications

(48 citation statements)

References 39 publications

(46 reference statements)

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“…Coffee and alcohol consumption, smoking status and physical activity at baseline were assessed with a set of standardized questions in a self-administered questionnaire mailed to the participants in advance. Coffee consumption was asked as a number of cups of coffee per day on average, and it was classified as 0-2, 3-4, 5-6 and seven cups or more per day Hu et al, 2006). We had information on type of coffee in the surveys in 1987, 1992 and 1997 and 82% of consumed coffee in these surveys was filtered coffee.…”

Section: Methodsmentioning

confidence: 99%

“…Several recent cohort studies (Van Dam and Feskens, 2002;Carlsson et al, 2004;Rosengren et al, 2004;Salazar-Martinez et al, 2004;Tuomilehto et al, 2004;Hu et al, 2006) and systematic reviews (van Dam and Hu, 2005;Greenberg et al, 2006) have been shown that long-term consumption of coffee may lower the risk of type II diabetes. The mechanism of the association has not been clarified yet, but several plausible mechanisms have been suggested .…”

Section: Introductionmentioning

confidence: 99%

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Coffee consumption, serum γ-glutamyltransferase and risk of type II diabetes

Bidel

Silventoinen

et al. 2007

Eur J Clin Nutr

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Objectives: To study the joint association of coffee consumption and serum g-glutamyltransferase (GGT) levels on the risk of developing type II diabetes. Design, setting and subjects: A total of 21 826 Finnish men and women who were 35-74 years of age and without any history of diabetes at baseline (years 1982, 1987, 1992 and 1997) were included in the present analyses. They were prospectively followed up for onset of type II diabetes (n ¼ 862 cases), death or until the end of the year 2002. Coffee consumption, serum GGT and other study parameters were determined at baseline using standardized measurements. Analyses were stratified by the serum GGT level classified into two classes using the 75th sex-specific percentiles as the cut point. Results: Coffee consumption was significantly and inversely associated with incident diabetes among both men and women. Serum GGT modified the association between coffee consumption and incident diabetes. Subjects in the high category of coffee consumption with the GGT level X75th percentile showed a significant inverse association for women, and for both sexes combined. The association was not significant in subjects with the GGT level p75th percentile. There was a significant interaction effect of GGT and coffee consumption on risk of type II diabetes in data of women (P ¼ 0.05) and in both sexes combined (P ¼ 0.02). Conclusions: Habitual coffee consumption is associated with lower incidence of type II diabetes particularly in those with higher baseline serum GGT levels.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Coffee consumption, serum γ-glutamyltransferase and risk of type II diabetes

Bidel

Silventoinen

et al. 2007

Eur J Clin Nutr

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“…45 Overall RR and 95% CI were directly extracted from two studies. 28,30 In other included studies, we calculated the total RR and 95% CI with the information provided. In addition, we analyzed tea consumption by men and women separately and distinguished three levels: <1 cup per day; 1-3 cups per day; and ≥4 cups per day.…”

Section: Discussionmentioning

confidence: 99%

“…To our knowledge, several epidemiologic studies [25][26][27][28][29][30][31][32][33][34] have been performed to investigate the association of tea consumption with type 2 diabetes; however, the results of these studies were not entirely consistent: some studies showed that tea consumption might reduce the risk of type 2 diabetes, 25,28,29,[32][33][34] whereas others found nonsignificant relationships between the two. 26,27,30,31 Because the relationship between tea consumption and risk of type 2 diabetes is still equivocal, we conducted this meta-analysis to further clarify this association based on the studies from the United States, Europe, and Asian countries.…”

Section: Introductionmentioning

confidence: 99%

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Tea Consumption and Risk of Type 2 Diabetes: A Meta-Analysis of Cohort Studies

Jing

Han

et al. 2009

J GEN INTERN MED

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BACKGROUND: Tea consumption has been extensively studied in relation to various diseases, several epidemiologic studies have been performed to investigate the association of tea consumption with type 2 diabetes; however, the results of these studies were not entirely consistent. OBJECTIVE:To conduct a meta-analysis of studies that assessed the association of tea consumption and the risk of type 2 diabetes. RESEARCH DESIGN AND METHODS:We performed a systematic literature search through November 2008 in PUBMED, MEDLINE, EMBASE, and Cochrane Database of Systematic Reviews. The search was limited to Englishlanguage studies. Studies were excluded if they were type 1 diabetes, animal studies. Nine cohort studies were identified by two authors, and summary relative risks (RRs) were calculated using a random-effects model. RESULTS:We identified nine cohort studies, including 324,141 participants and 11,400 incident cases of type 2 diabetes with follow-up ranging from 5 to 18 years. The summary adjusted RR did not show that tea consumption was associated with a reduced type 2 diabetes risk (RR, 0.96; 95% confidence interval (CI), 0.92-1.01). Evidence from the results of our stratified analyses revealed that tea consumption ≥4 cups per day (RR, 0.8; 95% CI, 0.7-0.93) might play a role in the prevention of type 2 diabetes. However, no statistically significant association was observed for sex and the follow-up durations stratified between tea consumption and type 2 diabetes. CONCLUSIONS:This meta-analysis indicates that tea consumption ≥4 cups per day may lower the risk of type 2 diabetes.KEY WORDS: type 2 diabetes; tea; meta-analysis.

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Coffee, Decaffeinated Coffee, and Tea Consumption in Relation to Incident Type 2 Diabetes Mellitus

et al. 2009

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Owing to the presence of small-study bias, our results may represent an overestimate of the true magnitude of the association. Similar significant and inverse associations were observed with decaffeinated coffee and tea and risk of incident diabetes. High intakes of coffee, decaffeinated coffee, and tea are associated with reduced risk of diabetes. The putative protective effects of these beverages warrant further investigation in randomized trials.

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Joint association of coffee consumption and other factors to the risk of type 2 diabetes: a prospective study in Finland

Abstract: Coffee drinking was associated with a reduced risk of type 2 diabetes in both men and women, and this association was observed regardless of the levels of physical activity, BMI and alcohol consumption.

Cited by 56 publications

References 39 publications

Coffee consumption, serum γ-glutamyltransferase and risk of type II diabetes

Coffee consumption, serum γ-glutamyltransferase and risk of type II diabetes

Tea Consumption and Risk of Type 2 Diabetes: A Meta-Analysis of Cohort Studies

Coffee, Decaffeinated Coffee, and Tea Consumption in Relation to Incident Type 2 Diabetes Mellitus

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